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forgejo/modules/secret/secret.go
Gusted 0d8478cff8
[GITEA] Drop sha256-simd in favor of stdlib
- In Go 1.21 the crypto/sha256 [got a massive
improvement](https://go.dev/doc/go1.21#crypto/sha256) by utilizing the
SHA instructions for AMD64 CPUs, which sha256-simd already was doing.
The performance is now on par and I think it's preferable to use the
standard library rather than a package when possible.

```
cpu: AMD Ryzen 5 3600X 6-Core Processor
                │  simd.txt   │               go.txt                │
                │   sec/op    │    sec/op     vs base               │
Hash/8Bytes-12    63.25n ± 1%    73.38n ± 1%  +16.02% (p=0.002 n=6)
Hash/64Bytes-12   98.73n ± 1%   105.30n ± 1%   +6.65% (p=0.002 n=6)
Hash/1K-12        567.2n ± 1%    572.8n ± 1%   +0.99% (p=0.002 n=6)
Hash/8K-12        4.062µ ± 1%    4.062µ ± 1%        ~ (p=0.396 n=6)
Hash/1M-12        512.1µ ± 0%    510.6µ ± 1%        ~ (p=0.485 n=6)
Hash/5M-12        2.556m ± 1%    2.564m ± 0%        ~ (p=0.093 n=6)
Hash/10M-12       5.112m ± 0%    5.127m ± 0%        ~ (p=0.093 n=6)
geomean           13.82µ         14.27µ        +3.28%

                │   simd.txt   │               go.txt                │
                │     B/s      │     B/s       vs base               │
Hash/8Bytes-12    120.6Mi ± 1%   104.0Mi ± 1%  -13.81% (p=0.002 n=6)
Hash/64Bytes-12   618.2Mi ± 1%   579.8Mi ± 1%   -6.22% (p=0.002 n=6)
Hash/1K-12        1.682Gi ± 1%   1.665Gi ± 1%   -0.98% (p=0.002 n=6)
Hash/8K-12        1.878Gi ± 1%   1.878Gi ± 1%        ~ (p=0.310 n=6)
Hash/1M-12        1.907Gi ± 0%   1.913Gi ± 1%        ~ (p=0.485 n=6)
Hash/5M-12        1.911Gi ± 1%   1.904Gi ± 0%        ~ (p=0.093 n=6)
Hash/10M-12       1.910Gi ± 0%   1.905Gi ± 0%        ~ (p=0.093 n=6)
geomean           1.066Gi        1.032Gi        -3.18%
```

(cherry picked from commit abd94ff5b5)
(cherry picked from commit 15e81637ab)

Conflicts:
	go.mod
	https://codeberg.org/forgejo/forgejo/pulls/1581
(cherry picked from commit 5caea2d75aeac78fb306f58a3cf7809d5b70c7f2)
(cherry picked from commit 08da542cce)
(cherry picked from commit d71a8cc9fb)
(cherry picked from commit 63c9fc2bee)
(cherry picked from commit e1db85d48a)
(cherry picked from commit 5e86a5d2d1)
2023-11-13 14:06:31 +01:00

78 lines
2.3 KiB
Go

// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package secret
import (
"crypto/aes"
"crypto/cipher"
"crypto/rand"
"crypto/sha256"
"encoding/base64"
"encoding/hex"
"errors"
"fmt"
"io"
)
// AesEncrypt encrypts text and given key with AES.
func AesEncrypt(key, text []byte) ([]byte, error) {
block, err := aes.NewCipher(key)
if err != nil {
return nil, fmt.Errorf("AesEncrypt invalid key: %v", err)
}
b := base64.StdEncoding.EncodeToString(text)
ciphertext := make([]byte, aes.BlockSize+len(b))
iv := ciphertext[:aes.BlockSize]
if _, err = io.ReadFull(rand.Reader, iv); err != nil {
return nil, fmt.Errorf("AesEncrypt unable to read IV: %w", err)
}
cfb := cipher.NewCFBEncrypter(block, iv)
cfb.XORKeyStream(ciphertext[aes.BlockSize:], []byte(b))
return ciphertext, nil
}
// AesDecrypt decrypts text and given key with AES.
func AesDecrypt(key, text []byte) ([]byte, error) {
block, err := aes.NewCipher(key)
if err != nil {
return nil, err
}
if len(text) < aes.BlockSize {
return nil, errors.New("AesDecrypt ciphertext too short")
}
iv := text[:aes.BlockSize]
text = text[aes.BlockSize:]
cfb := cipher.NewCFBDecrypter(block, iv)
cfb.XORKeyStream(text, text)
data, err := base64.StdEncoding.DecodeString(string(text))
if err != nil {
return nil, fmt.Errorf("AesDecrypt invalid decrypted base64 string: %w", err)
}
return data, nil
}
// EncryptSecret encrypts a string with given key into a hex string
func EncryptSecret(key, str string) (string, error) {
keyHash := sha256.Sum256([]byte(key))
plaintext := []byte(str)
ciphertext, err := AesEncrypt(keyHash[:], plaintext)
if err != nil {
return "", fmt.Errorf("failed to encrypt by secret: %w", err)
}
return hex.EncodeToString(ciphertext), nil
}
// DecryptSecret decrypts a previously encrypted hex string
func DecryptSecret(key, cipherHex string) (string, error) {
keyHash := sha256.Sum256([]byte(key))
ciphertext, err := hex.DecodeString(cipherHex)
if err != nil {
return "", fmt.Errorf("failed to decrypt by secret, invalid hex string: %w", err)
}
plaintext, err := AesDecrypt(keyHash[:], ciphertext)
if err != nil {
return "", fmt.Errorf("failed to decrypt by secret, the key (maybe SECRET_KEY?) might be incorrect: %w", err)
}
return string(plaintext), nil
}